Closure lock



Filed Sept. 7, 1949 Dec. 1, 1953 D. N. JEWETT ET AL 2,660,875

CLOSURE LOCK 2 Sheets-Sheet 2 I ISnventor E64 6 72, afezae/ BB f/c m$Jew@/% MW 2 M attornegs Patented Dec. 1, 1953 FFlCE r CLOSURE LooK Deane N. Jewett and Richard S. Jewett, Detroit,

Mich., assignors to Detroit Hardware Mann facturing tion of Michigan Application September 7, 1949, Serial No. 114,422

Y 3 llail ns (Cl. 70.352)

This invention relatesto locks, and, in particular, to closure locks for doors or the like.

In previous locks, such as are insertedin the edges of hollow doors, such as hollow metal doors, it has been necessary to tilt the lock inwardly. through the opening and also to ,cut away the door rearwardly of the cavity required for the lock; in order to provide enough room for such tilting, in order to get the attachment portions-of the mounting plate or front into the cavity behind the edge Wall of the door so as to secure it in placeby suitable fasteners. It has also hithertolbeen necessary to form the lock case by casting or by fitting it together in separate pieces which are rather loosely or in accuratelyassociated-with one another. Ithas further been difiicult hitherto, tot-prevent the sawing of the bolt of the lock to break the lock and gain admittance.

One object of this invention is to provide a closure lock having swinging tabs for attachment to the edge wallqof a hollow door or other closure, so that the cavity infthe ,door needs only to be the size of the lockbody and'does not require additional hollowing out, nor tilting of the look .into the door cavity in order. to

place it in position.

Another object is to provide a closure lock having a case which is extruded in two interlocking portions so as to'give an accurate interfitting,0f ,the two portions and thereby eliminate the need for cover plates and the machining connected with them.

Another object is ;to provide a closure lock,

the parts of which may be assembled and disassembled without the use of special tools; r Another object .is .to provide a closure lock wherein the bolts and also tumble-pins-orbolt dog'ging'pins are extruded in the formof bars and cut into sections to produce these elements, therebyeliminating .much machining hitherto required. r v,

Another object is .to provide a closure lock having a sliding boltengageable by a tumbler pin or bolt-dogging element having: arms extending into grooves -or slots in the opposite side. walls of the lock case, thereby providing additional guidance and support for the tumbler pin or bolt-dogging element and increasingthe smoothness of operation ofthe lock.

Company, Detroit, Mich., a, corporav the retracted position of thebolt;

Another object is to provide a closure'lock having a hardened pin loosely and rotatably mounted within the bolt so that any attempt to saw through the bolt by a hack saw will be circumvented as soon asthesaw blade reaches the pin, which merely rotates like; a" roller to and fro as the saw blade'is pulled back" and forth. v.

Another object is to provide a closure lock wherein a'front or mounting plate is attached to the case by being provided with lugs or bosses which are inserted in corresponding recesses in the case and held in position'by pins or fasteners.

Inthe drawings; r r t Figure 1 is afront elevation of a closure'lock, according. to one form of the invention, mounted in the edge'wallofadoor;

vFigure 2 isl-a side elevation-of the closurelock, partly in verticalsectionalong the,1i ne: 2 2 in Figure 1,..shovving the position of. the parts. in

Figure 3 'is a cross-section through the closure lock taken along, the line 3 -3 in Figure 2;

Figure 4 is a perspective view of thetumbler pinor bolt-dogging element used in the lock of Figures 1 to 3inc1usive;' i

Figure 5 is a perspective view of the bolt used in the lock-of Figures 1 to 3 inclusive;

' Figure 6 isa fragmentary side elevation bf in Figure 8;

the "bolt, bolt-dogging element and cam in the intermediate position between its fully open and fully closed-positions; v v v t Figure 7 is a side velevation of the closure look, similar to Figure 2,-butshowing the 'positioniof thepa-rts in the extended position of thebolt; Figure-8 is a side. elevation, partly in vertical section, similar. to.Figure 2, but showing; a modifled-lock; -l i k Figure, 9 is a cross-section. :through I the -closure lock of Figure 8, taken along the line. 9,-9

- Figure" 10- is a horizontal section taken. along the line-1 0-4 0 in Figure 8;,,

Figurell "is a perspective viewof the lock bolt usedin the-modified closure lockoff Fig ures 8 to 10 inclusive; and z' Figure 12 is a perspectiveviewofi the umbler pin or bolt-dogging elementof the'modifiedlclosure lock shown in Figuresswto-lozinclusivef 1 Referring to the drawingsin "detail," Figures serted, the fasteners l to 3 inclusive and 7 show a closure lock, generally designated H), as mounted in an opening II in the edge wall |2 of a door |3, such as a hollow metal door. The door I3 is also provided with aligned side apertures I4 and I5 for the insertion of the lock-operating cylinders l6 and II respectively. The lock operating cylinders H5 and H are of conventional form well known to those skilled in the locksmith art and their details are outside the scope of the present invention. For the purposes, of the present invention, it may be stated that the lock operating cylinders l6 and I1 consist of threads l9 thereon with longitudinal notches 2G for receiving the ends of a locking set screw 2| (Figure 2) to prevent rotation after the cylin-t der IE or l1 has once been placed in position. The cylinders l6 and H are provided with rotary elements 22 containing key slots 23 and extending through an escutcheon plate or flanged plate 24 to the opposite ends of the cylinder bodies I8, where they are provided with so-called cams 25 of key-hole shaped form consisting of a, bolt.- operating finger portion 26 and a circular base portion 21 secured by fasteners, 28 to the rotary elements 22 (Figure 6) Thus, when a key of suitable configuration is inserted in the key slot 23, the key pushes the tumblers out of the way and permits the rotary element 22 and cam 25 to be rotated in order to actuate the lock bolt.

The lock l9 consists of a case 30 comprising interfitting halves 3| and 32 having upper and lower dove-tail connections 33 and 34 therebetween. The halves. 31 and 32 are preferably extruded. together with their dovetail po ions, 33 and 3.4,, the outer half 3|, thereby overhanging and partially enclosing the i ner half 32. The inner half 32 has a recess or cavity 35 therein which, with the inner wall 36 of the outer half 3|, (Figure 3.) forms, the o chamber 3 con taining the moving parts of the lock. Reciprocably mounted in the lock chamber 31* is a lock bolt, generally de na d 8, f ppr mately rectangular shape and having a vertical slot or guideway 39 extending downward from its upper surface 40. The bolt 38 is provided with an inclined or diagonal hole, 4 extending downward nearly to the front surface 42 and containing a hardened roller 43 oi steel or other suitable hard metal loosely and rotatably mounted therein, This pin 43 prevents burglary by sawing through the b it 38 with a hacksaw, since the loosely mounted hardened pin 43' merely rotates to and fro as the saw is drawn back and forth, The top surface and bottom surface 44 of the bolt 38 slide to and fro. through an apertrue 45 in a front or mounting plate 43 by which the lock I0 is secured to the door i3. The front 46 is in the form of an elongated plate having thickened portions or internal bosses 41 at its upper and lower ends containing pivot pins 48 on which are mounted swinging discs or tabs 49 having threaded, holes 50 therein. The lock is inserted into the opening H with the swinging discs 49 swung inward out of the way, into the position shown in dotted lines at the lower end of Figure 2. When the lock has been thus in- 40 are rotated by means of a screw driver placed in their slots 5|, rotating the discs 49 180 until their holes 50 coinside with the corresponding holes 52 in the door edge wall I2. The discs49 are fixedly secured to the pivot pins 48 by a splined connection 53 therebetween, whereas the pins 48 are rotatably mounted in their holes 54 in the thickened porcylinder bodies |8 having tions 41 to enable this swinging of the discs 49 to be done. When the holes 50 have been thus aligned with the holes 52, fasteners 55 are then threaded through the holes 52 into the threaded holes 50, securing the lock front 46 firmly in position. The lock front 46 is provided with tapered bosses or lugs 56 which enter correspondingly tapered sockets 51 in the case half 3| and are secured in position by pins 58 entering holes 59 which are partly within the lug 5B and partly within the case. half 3|, (Figure, 2).

In order to prevent movement of the bolt 38 to and fro except in response to the rotation of the rotary element 22 and cam 25 by means of the key (not shown), the lock is provided with a tumbler pin or bolt-dogging pin, generally designated 60 (Figure 4) and having a thickness corresponding to the width of the slot 39 in the bolt 38 with clearance sufiicient to permit it to move up and down therein. The element 69 has a downwardly projecting portion 6| which is relieved as at 62 to provide smoothness of operation and at its lower end is provided with outwardly projecting ribs 63 which engage the opposite sides of the cavity 35 and surface 35 (Figure 3). The, element 60 is also provided with a laterally extending lug 64 which is of rectangular cross-section and which is adapted to fit into either of a pair of rectangular-shaped detent notches 3,5 or 66 (Figure 2) in an elongated slot or recess 61 in the side wall 68 of the case half 32. The notches and 3,6 are separated from one another by a ridge or barrier 39 (Figure 2) A spring 10 inserted between the bottom of the cavity 35 and the top of a recess H in the boltdogging element 60 urges the latter upward so that when it is released by the cam 25, it will be forced into one of the notches 65 or 66. The

. case halves 3| and 32 are provided with aligned threaded holes 12' and 13 (Figure 3) for receiving the correspondingly threaded portions l9 of the cylinders l6 and H.

Operation In the operation of the invention, let it be a su d that the yl ders 16 and ll are. separated from the lock ill but that the front 46. has be s red thereto by he p ns. 59 and interfit ing l s 56 nd ockets 51. The disc 49 are turned toward the lock case 30, as shown, for the lower disc, by the dotted lines Figure 2. The lock is then inserted through the opening il in the doo dge wall [2, w reup n a s rew driver is inserted in the slot 5|, to rotate the pins. 48 and discs 49 until fasteners 55 may be threaded into the aligned holes 50 and 52 as explained above. This brings the holes 12 and 13 opposite and into alignment with the, holes 14, and I5 respectively in the door l3, whereupon the cylinders Hi and u may be threaded into the holes 12 and 13 and secured in position by the set screws 2| entering one of the notches 26, in each cylinder H5 or 11. ,The casing halves 3| and 32 are assembled by sliding them together along their dove-tail connections 33 and 34 until they are properly aligned with one another, whereupon they are held together by the pins, 58 which also lock the front as to the case at.

In order to operate the lock, a key is inserted in the keyslot 23 and, by moving the tumblers out of the way, is thereby permitted to swing the cam 25 so that it enters the upper end of the bolt notch 39 (Figure 2), pushing the bolt-dogging element or tumbler pin 60 downward as it swings in a clockwise direction (Figure *6) and 5 at the same time moving the bolt 38 to the left when the projection 64 has cleared the notch 65 and passes over the barrier 69. When the bolt reaches its extreme position to the left so as to lock the door (Figure 7), the cam swings upward out of the notch 39 and the spring 10 urges the tumbler pin or bolt-dogging'element 69 upward until its projection 64 enters the notch 66. The bolt 38' is thus held in its advanced position and cannot be retracted by inserting a screw driver in the crack between the door and door frame since this is prevented by the interengaging projection 64 'on the tumbler pin 69 and the notch 66 into which it fits (Figure 7).

Modification The modified lock, generally designated 80, shown in Figures 8 to 12 inclusive, is generally similar in construction and operation to the lock l shown in Figures 1 to 7 inclusive, and similar parts are designated with the same reference numerals. The lock 89, however, is intended for smaller doors and is therefore made in smaller sizes than the lock l0. Consequently, the lock case 81 is made in a single piece rather than in extruded interfitting halves as in the instance of the case halves 3| and 32 of the lock I9. The case 8| is provided with upwardly and downwardly extending cars 82 which are provided with threaded holes 83 aligned with holes 84 in the front 85 and secured thereto by fasteners 85. The upper and lower ends of the front 85 are provided with swinging tabs or discs 49 (only one being shown) similar to those in Figures 1 to 3 inclusive and similarly mounted on pivot pins 48 adapted to be rotated by a screw driver inserted in the slot 5|. Installation by swinging these tabs 49 and threading fasteners into their holes is accomplished in the manner previously described.

The bolt 81 in the lock 89 is generally similar to the bolt 38 of Figure 5 in that it has a similar notch 39 and a similar but differently inclined bore 4i also containing a loosely rotatable hardened steel pin 43. The bolt 81 is provided with an upper extension 88 at the top thereof and an arcuate cut away portion 89 is provided to permit free swinging of the cam or cams 25.

The tumbler pin or bolt-dogging element 90 of the lock 89 (Figure 12) is similar to the corresponding element 60 of Figure 4, except that it is provided with oppositely extending projections '64 on both sides thereof instead of on a single side. The spring 19 is similarly mounted in the recess II and the opposite sides of the case 8| are provided with the slots 61 instead of only on one side as in the lock H1. The slots 67 of the lock 89 are similarly provided with notches 65 and 66 and have intervening projections 69. The construction of the cylinders I6 and I7 and their mounting is identical with that previously described, and hence requires no repetition.

In the operation of the modified lock 90 shown in Figures 8 to 12 inclusive, the lock is installed in the manner described in connection with the construction thereof and as also previously described in connection with the operation of the lock ID. The lock is operated, as before, by inserting the key (not shown) into the key slot 23, rotating the rotary element 22 and cam 25 in a clockwise direction, as before. This pushes the bolt-dogging element 99 downward, unseating both of its projections 64 from their corresponding notches $5 in the opposite side walls of the case 8| and lifts the element 99 over the projections 69, at the sametime pushing the bolt 81 to the left into its extended or looking position. When the bolt 81 has been fully extended, the wings or projections 64 move upward into the forward notches 66 and the cam moves upward out of the bolt notch 39 in a manner analogous to that shown in Figure 7 for the lock l0.

What we claim is:

,1. A closure lock adapted to be actuated by a conventional key-operated cylinder lock cam, said lock comprising a lock case having front and=rear surfaces and a bore extending therebetween; a lock bolt reciprocably mounted in said bore and having a transversely-disposed guideway therein, said case having an elongated open-ended slot in one of the side walls of said bore extending from an open end at one of said surfaces toward the other surface in a direction parallel to the direction of reciprocation of said bolt, a tumbler reciprocably mounted in said guideway and reciprocably engageable with said cam, said tumbler having a recess extending inwardly from one end thereof and a projection extending laterally from the other end thereof into said slot, and a spring disposed in said recess and guideway for yieldingly urging said tumbler against said cam, said slot having an offset notch in one edge thereof configured to receive said lateral projection of said tumbler in one position of said bolt.

2. A closure lock adapted to be actuated by a conventional key-operated cylinder lock cam, said lock comprising a lock case having front and rear surfaces and a bore extending therebetween, a lock bolt reciprocably mounted in said bore and having a transversely-disposed guideway therein, said case having an elongated openended slot in each of the opposite side walls of said bore extending from an open end at one of said surfaces toward the other surface in a direction parallel to the direction of reciprocation of said bolt, a T-shaped tumbler reciprocably mounted in said guideway and reciprocably engageable with said cam, said tumbler having a recess extending inwardly from one end thereof and a pair of projections extending laterally from the other end thereof into said slots, and a spring disposed in said recess and guideway for yieldingly urging said tumbler against said cam, each of said slots having an offset notch in one edge thereof configured to receive one of said lateral projections of said tumbler in one position of said bolt.

3. A closure lock adapted to be actuated by a conventional key-operated cylinder lock cam, said lock comprising a lock case having front and rear surfaces and a bore extending therebetween, a lock bolt reciprocably mounted in said bore and having a transversely-disposed guideway therein, said case having an elongated openended slot in each of the opposite side walls of said bore extending from an open end at one of said surfaces toward the other surface in a direction parallel to the direction of reciprocation of said bolt, a T-shaped tumbler reciprocably mounted in said guideway and reciprocably engaseable with said cam, said tumbler having a recess extending inwardly from one end thereof and a pair of projections extending laterally from the other end thereof into said slots, and a spring disposed in said recess and guideway for yieldingly urging said tumbler against said cam, each of said slots having an offset notch 7 in one edge thereof configured to receive one of said lateral projections of said tumbler in one position of said bolt, said bolt having a cutaway portion adapted to receive the cylinder of said cylinder lock cam, said bolt also having a guide portion guidingly engageable with said bore on the opposite side of said cutaway portion from said guideway.

DEANE N. JEWETT.

RICHARD S. JEWETT.

References Cited in the file of this patent UNITED STATES PATENTS Number Number Number 8 Name Date Weed c Aug. 9, 1910 Bock June 14, 1921 Carlin Apr.v 29, 1930 Lindquist et al. July 14, 1931 Jacobi Mar. 9, 1943 Schlage Aug. 17, 1943 Erkkila Nov. 16, 1948 Baume May 23, 1950 FOREIGN PATENTS Country Date France Nov. 8, 1930 France June 23, 1939 

